Roles of various composts based on phosphate flotation …

The use of composts promotes plant growth and physiology as a promising sustainable strategy. The main objective of this study is to evaluate the impact of phosphate flotation waste (PFW) and phosphogypsum (PPG) composts on the growth and physiology of tomato plants under two water regimes (40% field capacity (FC) and 80% FC). The experiment …

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CN102500469A

The invention relates to a phosphogypsum reverse flotation, desilication and impurity removal process; and targeting at the characteristic that the content of SiO2, phosphorus, F, acid insoluble substances and other impurities in phosphogypsum solid waste is high, a process of carrying out single or double reverse flotation by adding in regulator and collector is adopted; the regulator …

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CN111545342B

The invention discloses a method for purifying phosphogypsum based on a flotation column and a gravity column with fillers, which comprises the following steps: the purification effects of phosphogypsum decoloration, whitening, phosphorus reduction and impurity reduction are achieved by utilizing the differences of density, granularity and surface chemical properties …

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A Novel Process to Recover Gypsum from Phosphogypsum

where R is the recovery of gypsum (%), Q 1 is the weight of the flotation concentrate (g), G 1 is the calcium sulfate dehydrate of the flotation concentrate, Q 0 is the weight of phosphogypsum (g), and G 0 is the calcium sulfate dehydrate of phosphogypsum (g).. 2.3. Analyses. The whiteness of the gypsum concentrate samples was measured using a WSD-3C whiteness …

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Reuse of phosphogypsum and phosphorus ore flotation …

Request PDF | On Mar 1, 2023, Wei Jiang and others published Reuse of phosphogypsum and phosphorus ore flotation tailings as adsorbent: The adsorption performance and mechanism of phosphate | Find ...

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Research advances in phosphogypsum flotation purification: …

Simple and efficient method for purification and recovery of gypsum from phosphogypsum: Reverse-direct flotation and mechanism

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An innovative method for simultaneous stabilization/solidification of

Phosphogypsum (PG) contains plenty of PO 4 3− and F − and some heavy metals. Phosphorus ore flotation tailings (POFT) mainly consist of dolomite (CaMg(CO 3) 2) and calcium fluophosphate (Ca 5 (PO 4) 3 F), and it also contain other soluble impurities. Separate storage of PG and POFT could seriously damage the ecological environment.

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Reuse of phosphogypsum and phosphorus ore flotation …

Phosphogypsum (PG) and phosphorus ore flotation tailings (POFT) are generated in the phosphorus chemical industry, where stockpiling PG and POFT causes serious pollution to the environment. In this study, a novel adsorbent material (i.e., PGTA) was prepared in proportion to PG, POFT and starch to remove phosphate from the aqueous solution.

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The effect of phosphate flotation wastes and phosphogypsum …

In this study, the effect of phosphates flotation wastes (PFW) and phosphogypsum (PPG) on organic biomass degradation, compost quality, and plant growth was examined. Our results showed that PFW and PPG improve composting mechanisms, accelerate organic substance degradation, and increase fertilizing elements (P2O5, K2O, MgO, CaO). The low …

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Effect of Flotation Purification on Preparation of …

Phosphogypsum produced by phosphorus chemical industry is the bulk industrial solid waste. The impurities would reduce the performance of β−hemihydrate gypsum that was prepared from phosphogypsum. In this study, phosphogypsum was purified by flotation method, and the performance of β−hemihydrate gypsum prepared from phosphogypsum before and …

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Simple and efficient method for purification and recovery of …

The selective flotation separation of gypsum and quartz in phosphogypsum (PG) is an urgent problem that is very important for the high‐value utilization of PG.

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Desilication and purification of phosphogypsum waste by flotation …

DOI: 10.1016/j.molliq.2024.125736 Corpus ID: 272180153; Desilication and purification of phosphogypsum waste by flotation using a photosensitive collector @article{Li2024DesilicationAP, title={Desilication and purification of phosphogypsum waste by flotation using a photosensitive collector}, author={Huiyong Li and Guoli Zhou and Fengxia …

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The effect of phosphate flotation wastes and phosphogypsum …

The main objective of this study is to evaluate the impact of phosphate flotation waste (PFW) and phosphogypsum (PPG) composts on the growth and physiology of tomato plants under two water regimes ...

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Staged purification of phosphogypsum using pH …

Phosphogypsum (PG) is an industrial by-product of the transformation of phosphate rocks. For decades, PG has been a source of environmental concern due to the massive amount produced thus far, i.e., 7 billion tons, with a current production rate of 200–280 million tons per year. Phosphate minerals contain various impurities that precipitate and …

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[PDF] The study on the effect of flotation purification on the

The mechanical strength of high strength gypsum prepared from PG concentrate was significantly better than that of raw PG, indicating that flotation purification can effectively improve the performance of PG. Phosphogypsum (PG) is a massive industrial solid waste. In this paper, PG was purified by flotation method, and α-hemihydrate gypsum (α-HH) was prepared …

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A novel method for purification of phosphogypsum

problems. A large scale of phosphogypsum is consunmed in the building field. The characteristics of whiteness and phosphorus content are important factors affecting the use of phosphogypsum as a building material. In this study, soluble phosphorus and fluorine were removed by adding lime, and flotation was employed to purify phosphogypsum.

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Selective flotation separation of gypsum and quartz using …

The selective flotation separation of gypsum and quartz in phosphogypsum (PG) is an urgent problem that is very important for the high-value utilization of PG. In the work, dodecyl amine hydrochloride (DH) was introduced as a collector for the selective flotation separation of gypsum and quartz.

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Flotation purification of waste high-silica phosphogypsum.

DOI: 10.1016/j.jenvman.2022.115824 Corpus ID: 251339939; Flotation purification of waste high-silica phosphogypsum. @article{Fang2022FlotationPO, title={Flotation purification of waste high-silica phosphogypsum.}, author={Ji Fang and Yingyong Ge and Zhijie Chen and Baolin Xing and Shenxu Bao and Qing Yong and Ruan Chi and Siyuan Yang and Bing‐Jie Ni}, …

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Effect of Flotation Purification on Preparation of …

In this study, phosphogypsum was purified by flotation method, and the performance of β−hemihydrate gypsum prepared from phosphogypsum before and after …

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Research advances in phosphogypsum flotation …

DOI: 10.1016/j.seppur.2024.129244 Corpus ID: 271943183; Research advances in phosphogypsum flotation purification: Current status and prospects @article{JiaResearchAI, title={Research advances in phosphogypsum flotation purification: Current status and prospects}, author={Wenke Jia and Jingchao Li and Changpan Shen and Guosheng Li and Huiyong Li and …

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Experimental Study on Phosphogypsum Desilication by Flotation

Experimental Study on Phosphogypsum Desilication by Flotation[J]. Multipurpose Utilization of Mineral Resources, 2014, (6): 39-42. doi: 10.3969/j.issn.1000-6532.2014.06.010. Zhu Pengcheng, Wang Guodong, Zeng Bo. Experimental Study on …

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Research on the Flotation Mechanism of Microemulsion …

Phosphogypsum is an industrial byproduct that is limited in its high-value application due to the presence of dyeing impurities (such as organic matter and carbon black). The flotation method has been verified to be effective in separating these dyeing impurities from gypsum. In this study, microemulsion was used as the collector method of dyeing impurities for …

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Phosphogypsum flotation purification method

The invention discloses a method for flotation and purification of phosphogypsum, and belongs to the field of comprehensive utilization of solid waste. The method comprises the following steps: 1) Adding an appropriate amount of water into phosphogypsum, adjusting the phosphogypsum to a certain concentration, and fully stirring; 2) Adding an alcoholic solution of organic silicon …

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The study on the effect of flotation purification on the …

The specific procedure was as follows: 2 g of PG concentrate (purified phosphogypsum by flotation), solid–liquid ratio 1:1 49, was weighed and hydrothermally reacted in a 50 ml autoclave at 140 °C under fully closed conditions (the pressure of operation is 3 MPa), and the sample was quickly removed after 2 h of reaction, the upper liquid ...

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Flotation purification of waste high-silica phosphogypsum

Herein, a typical high-silica phosphogypsum waste was purified by a new "reverse-direct flotation" method. The organic matters and fine slimes were removed by reverse …

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The study on the effect of flotation purification on the …

Phosphogypsum (PG) is a massive industrial solid waste. In this paper, PG was purified by flotation method, and α‐hemihydrate gypsum (α‐HH) was prepared by the autoclaving method. …

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Novel ethylbenzyl and hydroxyethyl quaternary ammonium …

Phosphoric acid is one of the important strategic raw materials [1]. Phosphogypsum (PG) is the main by-product generated during the production process of phosphoric acid, containing various harmful impurities such as SiO 2, organic matter, and fluorine [2].Statistics indicate that traditional wet-process phosphoric acid production generates 4.5 to 5.5 tons of PG per ton of phosphoric …

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Desilication Research of Sichuan Phosphogypsum by Flotation

At present, China's phosphogypsum has a large annual new emissions, environmental and safety risks, which seriously restrict the sustainable and healthy development of phosphorus chemical enterprises.In order to solve the problem of high silica content in Sichuan phosphogypsum, the desilication tests werecarried by reverse flotation process.The ...

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Properties, Purification, and Applications of Phosphogypsum…

Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 tons of PG is produced per ton of phosphoric acid production, where worldwide PG generation exceeds 300 million tons annually. The vast majority of produced PG is discarded irresponsibly, leading to …

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Deep Purification of Phosphogypsum Waste by Reverse Flotation …

Furthermore, the soluble phosphorus and fluoride transferred from PG into flotation wastewater could be effectively removed by CaO, and the treated wastewater can be reused for the re-flotation of PG. The flotation concentrate of PG fully meets the first-grade index required for gypsum building materials.

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Flotation purification of waste high-silica phosphogypsum

High-silica phosphogypsum (PG) is a kind of industrial by-product with great utilization potential. However, it is difficult to reuse PG directly due to the related gangue minerals (e.g., SiO 2), and thus efficient purification is required to allow its further applications.Herein, a typical high-silica phosphogypsum waste was purified by a new "reverse-direct flotation" method.

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A flotation combined extraction process for improving …

In this study, we report a flotation combined extraction process for enhancing the whiteness of PG. Before extraction, a large amount of SiO 2 and organic matter adhering to …

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Preparation of gypsum with high purity and whiteness from …

Phosphogypsum (PG) is a solid waste product generated during wet-process phosphoric acid production. Various impurities considerably reduce the purity, whiteness, and …

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The study on the effect of flotation purification on the …

Phosphogypsum (PG) is a massive industrial solid waste. In this paper, PG was purified by flotation method, and α-hemihydrate gypsum (α-HH) was prepared by the …

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Optimization of wet-process phosphoric acid for high-quality phosphogypsum

flotation gypsum, and 65 should be selected as the suitable floc flotation tempe rature. Fig. 2. Effect of temperature on grade, recovery, and whiteness (a), and pollution components (b) of the ...

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Staged purification of phosphogypsum using pH …

The flotation method reported here paves the way for the purification of high-silica phosphogypsum, which can be extended to the purification and value-added reutilization of other industrial ...

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A flotation combined extraction process for improving …

In order to improve the whiteness of phosphogypsum and reduce the cost, the advantages of flotation and extraction can be innovatively combined (Wang, 2020; Singh, 1993; Cao, 2022). In this study, we report a flotation combined extraction process for enhancing the whiteness of PG. Before extraction, a large amount of SiO 2

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Comparative analysis of colloid-mechanical …

Phosphogypsum is a kind of industrial byproduct mainly from the production process of wet-process phosphoric acid. Each ton of phosphoric acid produced will produce 5–5.5 tons of phosphogypsum [1], [2].The global phosphogypsum stockpile has exceeded 7 billion tons, the annual output is about 0.2 to 0.3 billion tons, and the utilization rate is less than 15% [3], [4].

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